氧化石墨及石墨烯对阳离子染料的吸附行为研究  

Investigation of Adsorption of Cationic Dyes on Graphene Oxide and Graphene

作　　者：李丽霞[1] 弓晓娟[1] 宋金萍[1,2] 周叶红[1] 郭玉晶[1] 董川[1] 

机构地区：[1]山西大学环境科学与工程研究中心,山西太原030006 [2]山西大同大学化学化工学院,山西大同037009

出　　处：《分析科学学报》2014年第3期323-326,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.21175086)

摘　　要：利用改进的Hummers-Offeman法合成氧化石墨(GO)和石墨烯,并以其作为吸附剂,选择三种阳离子染料为模型染料,通过测定吸附前后三种阳离子染料溶液的紫外-可见吸收光谱,考察pH、染料初始浓度、温度对吸附效果的影响,研究GO及石墨烯对这三种阳离子染料的吸附行为。结果表明,GO及石墨烯对三种阳离子染料的吸附过程均符合准二级反应动力学方程,且染料结构和pH对其吸附效率也有影响。Graphene oxide （GO） and graphene were synthesized by the modified Hummers-Offeman method. The UV-visible absorption spectra of three kinds of cationic dyes as model dyes were measured using GO and graphene sorbents,and the adsorption behaviors of these cationic dyes were studied. Batch adsorption experiments were carried out to study the effect of pH, concentration of dyes and temperature. The results showed that the adsorption process of three cationic dyes on the surface of GO and graphene fit pseudosecond-order model and the results also displayed that the dye structure,pH can affect the adsorption process of GO and graphene.

关 键 词：氧化石墨 石墨烯 阳离子染料 吸附行为 

分 类 号：O658[理学—分析化学]